Upgrade to 2021 edition

Author: djc

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "finalfusion"
 version = "0.17.1"
-edition = "2018"
+edition = "2021"
 rust-version = "1.64"
 description = "Reader and writer for common word embedding formats"
 documentation = "https://docs.rs/finalfusion/"

src/chunks/io.rs

@@ -1,4 +1,3 @@
-use std::convert::TryFrom;
 use std::fmt::{self, Display};
 use std::fs::File;
 use std::io::{BufReader, Read, Seek, Write};

src/chunks/norms.rs

@@ -1,6 +1,5 @@
 //! Norms chunk
 
-use std::convert::TryInto;
 use std::io::{Read, Seek, SeekFrom, Write};
 use std::mem;
 use std::mem::size_of;

src/chunks/storage/array.rs

@@ -1,4 +1,3 @@
-use std::convert::TryInto;
 use std::io::{Read, Seek, SeekFrom, Write};
 use std::mem;
 use std::mem::size_of;
@@ -13,7 +12,6 @@ use crate::util::padding;
 
 #[cfg(feature = "memmap")]
 mod mmap {
-    use std::convert::TryInto;
     use std::fs::File;
     #[cfg(target_endian = "little")]
     use std::io::Write;

src/chunks/storage/quantized.rs

@@ -1,4 +1,3 @@
-use std::convert::TryInto;
 use std::io::{Read, Seek, SeekFrom, Write};
 use std::mem;
 use std::mem::size_of;

src/chunks/storage/wrappers.rs

@@ -1,4 +1,3 @@
-use std::convert::TryFrom;
 #[cfg(feature = "memmap")]
 use std::fs::File;
 #[cfg(feature = "memmap")]

src/chunks/vocab/simple.rs

@@ -1,5 +1,4 @@
 use std::collections::HashMap;
-use std::convert::TryInto;
 use std::io::{Read, Seek, Write};
 use std::mem::size_of;
 

src/chunks/vocab/subword.rs

@@ -1,5 +1,4 @@
 use std::collections::HashMap;
-use std::convert::TryFrom;
 use std::io;
 use std::io::{ErrorKind, Read, Seek, Write};
 use std::mem::size_of;

src/chunks/vocab/wrappers.rs

@@ -1,4 +1,3 @@
-use std::convert::TryFrom;
 use std::io::{Read, Seek, SeekFrom, Write};
 
 use byteorder::{LittleEndian, ReadBytesExt};

src/compat/fasttext/io.rs

@@ -1,4 +1,3 @@
-use std::convert::TryInto;
 use std::io::{BufRead, Write};
 use std::ops::Mul;